Regular Expressions 101

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Community Patterns

0

Laravel all routes, except some

PCRE2 (PHP >=7.3)
When creating a SPA we could capture all routes except some. Needed this for Laravel Route::get('/{any?}', function () { return 'Not captured';...
Submitted by aldo-f - 2 years ago
0

implements Regex

PCRE2 (PHP >=7.3)
To match implements in classes
Submitted by anonymous - 2 years ago
0

match extends in a class

PCRE2 (PHP >=7.3)
to match extends in a class
Submitted by anonymous - 2 years ago
0

长宽高

PCRE2 (PHP >=7.3)
长宽高
Submitted by mouxan - 2 years ago
0

KPI Dash Drop-In Image Compliance

Python
This regex is designed for end users to test if there image file is name compliant.
Submitted by Jeremiah Carlson - 2 years ago
0

REGEX OS

Java 8
Regex para extrair titulo e descrição duma OS
Submitted by anonymous - 2 years ago
0

Password

PCRE2 (PHP >=7.3)
Password includes a,A,1,!$#%
Submitted by anonymous - 2 years ago
0

All kinds of stupid Content-Types

PCRE2 (PHP >=7.3)
Some applications send incorrect HEADERS:Content-Type. If it needs to pass the checks (for example, on WAF) this regex maybe used
Submitted by anonymous - 2 years ago
0

Email input validation

ECMAScript (JavaScript)
Regex to validate an email input with the following rules... Whole address: Up to 254 characters. Case insensitive. Username and domain separated by @ symbol....
Submitted by chCharly - 2 years ago (Last modified 2 years ago)
0

IPv4 input field validator

PCRE (PHP <7.3)
Use It for partial/complete IPv4 address input text checking. OK examples: 19 / 192. / 192.168.1 / 192.168.1.1 / 0.0.0.0 KO examples: 1A / 01 / 192.168..1
Submitted by José Luis García Morillo - 2 years ago
0

Match any number greater than 14 using regexp

ECMAScript (JavaScript)
Any number greater than 14 means: Any number with 3 or more digits with possible leading 0's Any number with 2 digits where the first digit in in the character class [2-9] Any number with 2 digits where the first digit is 1 and the second digit in in the character class [5-9] Inspired by:...
Submitted by anonymous - 2 years ago
0

Camel Case - no digits allowed

PCRE2 (PHP >=7.3)
To be proper camel case a word with no digits allowed, a word: MUST start with a lower case alphabet (a through z) MUST have no digits (0 - 9) MUST have no spaces, punctuation or special characters CAN have at most 1 uppercase alphabet in a row MAY end in an uppercase alphabet...
Submitted by roubles - 2 years ago (Last modified 2 years ago)
0

Camel Case - digits allowed

PCRE2 (PHP >=7.3)
To be proper camel case (with digits allowed) a word: MUST start with a lower case alphabet (a through z) MUST have no spaces, punctuation or special characters CAN have at most 1 uppercase alphabet in a row MAY end in an uppercase alphabet...
Submitted by roubles - 2 years ago
0

Camel Case - no digits allowed - Upto 3 upper case letters

.NET 7.0 (C#)
To be proper camel case a word with no digits allowed and upto 3 upper case letters, a word: Must start with a lower case alphabet (a through z) Must have no digits (0 - 9) MUST have no spaces, punctuation or special characters Can have at most 3 uppercase alphabets in a row Can end in an uppercase ...
Submitted by anonymous - 2 years ago (Last modified 2 years ago)
0

Camel Case - digits allowed - Upto 3 upper case letters

.NET 7.0 (C#)
Camel Case - digits allowed - Upto 3 upper case letters To be proper camel case a word with digits allowed and upto 3 upper case letters, a word: MUST start with a lower case alphabet (a through z) MUST have no spaces, punctuation or special characters CAN have at most 3 uppercase alphabets in a ro...
Submitted by anonymous - 2 years ago
0

Pascal Case - no digits allowed

ECMAScript (JavaScript)
To be proper pascal case with no digits allowed, a word: MUST start with an upper case alphabet (A through Z) MUST have no digits (0 - 9) MUST have no spaces, punctuation or special characters CAN have at most 1 uppercase alphabet in a row CAN end in an uppercase alphabet...
Submitted by anonymous - 2 years ago (Last modified 2 years ago)
0

Pascal Case - digits allowed

ECMAScript (JavaScript)
To be proper pascal case a word with digits allowed and with upto 3 upper case letters, a word: MUST start with an upper case alphabet (A through Z) MUST have no digits (0 - 9) MUST have no spaces, punctuation or special characters CAN have at most 1 uppercase alphabet in a row CAN end in an upperca...
Submitted by anonymous - 2 years ago
0

Pascal Case - no digits allowed - Upto 3 upper case letters

ECMAScript (JavaScript)
To be proper pascal case a word with no digits allowed and with upto 3 upper case letters, a word: MUST start with an upper case alphabet (A through Z) MUST have no digits (0 - 9) MUST have no spaces, punctuation or special characters CAN have at most 3 uppercase alphabets in a row CAN end in an upp...
Submitted by anonymous - 2 years ago (Last modified 2 years ago)
0

Pascal Case - digits allowed - Upto 3 upper case letters

ECMAScript (JavaScript)
To be proper pascal case a word with digits allowed and with upto 3 upper case letters, a word: MUST start with an upper case alphabet (A through Z) MUST have no spaces, punctuation or special characters CAN have at most 3 uppercase alphabets in a row CAN end in an uppercase alphabet ...
Submitted by anonymous - 2 years ago
0

PasCamelCase

PCRE2 (PHP >=7.3)
PasCamelCase A combination of pascal and camel case. PasCamelCase is a lenient case style that is allows a phrase to use either pascal case or camel case rules. In addition, PasCamelCase allows for 2-3 letter acronyms such as Rules For a phrase to be valid PasCamelCase it:...
Submitted by anonymous - 2 years ago (Last modified 2 years ago)
1...833834835836837...900

Community Library Entry

0

Regular Expression
PCRE2 (PHP >=7.3)

/
^[a-z][a-z]*(([A-Z][a-z]+)*[A-Z]?|([a-z]+[A-Z])*|[A-Z])$
/
gm
Open regex in editor

Description

To be proper camel case a word with no digits allowed, a word:

  • MUST start with a lower case alphabet (a through z)
  • MUST have no digits (0 - 9)
  • MUST have no spaces, punctuation or special characters
  • CAN have at most 1 uppercase alphabet in a row
  • MAY end in an uppercase alphabet

Notable examples

  • a is valid lower camel case
  • aG is valid lower camel case
  • camelCase is valid lower camel case
  • camelCasE is valid lower camel case
  • aGa is valid lower camel case
  • alphabet is valid lower camel case
Submitted by roubles - 2 years ago (Last modified 2 years ago)